High-speed traverse



' l. P. DENYSSEN 2,463,604

HIGH-SPEED TRAVERSE v 2 Sheets-Sheet 1 INVENTOR. IVANHOE 1-? DENYSSENMarch 8, 1949.

Filed June 2, 1947 March 8, 1949. P. DENYSSEN 2,463,604

HIGH- SPEED TRAVERSE Filed June 2, 1947 2 Sheets-Sheet 2 JNVENTOR.lVAA/HOE F? DENY$$EN Patented 8, 1 949 2,463,604 I men-sperm ranvaasnIvanhoe P. Denyssen, Lansdowne, Pa., assignor to American ViscoseCorporation, Wilmington, Del., a corporation of Delaware ApplicationJune 2, 1947, Serial-No. 751,756

7 Claims. (01. 74-50) This invention relates to traversing mechanlsms;more particularly this invention relates to a traversing mechanism thatis employed on a spinning machine used in the manufacture of artificialfilaments.

According to the spinning process for the manufacture of viscose rayonyarn, the freshly formed yarn leaving the spinning bath is collected inpackage form in a rotating spinning bucket or wound on bobbins. Thefully wound package is subjected in later operations to treatment withvarious liquids by pressure or suction means to yield a purified yarnsuitable for uses in the textile art. It is necessary that the yarnpackage be uniformly porous and liquid permeable so that this liquidtreatment may proceed to a uniform extent and in a rapid and economicalmanner.

A package is fully processed only after all of its regions have beencompletely treated. There are two distinct regions in the cakes crosssection: one, the middle portion and two, the end extremities. To beideal, the entire cross section should process at an equal rate, howeverin the conventional method of cake forming the middle portion respondsmore promptly than the end portions. The end portions, owing to theirgreater density,-determine the processing time requirements. The greaterdensity is the result of a slow reversal which is a result of deviatingfrom a uniform straight line motion at the re-' versal points in the camto reduce the force of reversal or shock.

The present invention overcomes this difficulty by reversing morerapidly at the end of the stroke. In the new method of operation,uniform straight line motion is attained by the compounding of a simpleharmonic motion and a correction cam. The force at reversal is thusdivided up between the eccentric bearing of the simple harmonic motionand the correction cam.

The principal object of the present invention is to provide a traversemechanism that will effectively manufacture a wound package of moreuniform density from end to end in a spinning bucket, or on a bobbin, orthe like.

Another object of the present invention is to provide a traversemechanism that will operate at high speeds to conform to increasedspinning speeds.

Other objects and advantages of the invention will appear from thefollowing detailed description of an embodiment thereof in a device forreciprocating a strand distributing member taken in connection with theaccompanying drawings in which the same reference numerals are applied 2to identical parts in the several figures, and in which Figure 1 is afront view partly in section of a preferred embodiment of the presentinvention taken along line I--I in Figure 2;

Figure 2 is an elevational view partly in section taken along line IIIIof Figure 1;

Figure 3 is a view of Figure 2 looking along line III-III;

Figure 4 is an elevational view partly in section of a spinning machinewith an embodiment of the present invention mounted in place.

Figures 5 and 6 illustrate two modifications of the cam track-employedin the present invention.

In the embodiment of the invention to be described herein, a spur gear Iis rotatably mounted on the stud shaft 2 by the bearing 3, said studshaft being fixedly secured in the housing 4. Rotation is imparted tothe spur gear I by the driving pinion 5. Rotatably mounted on the hub ofthe spur gear by the bearing 6 is a crank arm i which has gear teeth 8on part of its circumference. These gear teeth 8 mesh with teeth on asector arm 9 which is pivoted on a pin Hi secured in the flanged portionof the spur gear 6. An eccentric arm Ii carrying a cam follower I2 isfixedly secured to the sector arm El so that it extends at apredetermined angle therefrom. The cam follower'travels in the cam trackit in a ring I3A which is adjustably secured to the back plate It of thehousing a.

A pin l5 connected to the outer end of the crank arm and extendingsubstantially parallel to the stud shaft 2 has an eccentric member orsleeve 30 rotatably mounted thereon. The eccentric member 30 has a slideblock Hirotatably mounted thereon. As shown the pin I5 is threaded onits free end and a nut 29 is screwed thereon to secure the eccentric 30and the slide block It in place. The block l6 slides in two grooves ortracks I! in the opposed faces of the yoke I ll. As the crank member 1is rotated by sector 9 and gear I, the block I6 imparts a reciprocatingmotion to the yoke. Attached to the base of the yoke l8 andreciprocating therewith is a traverse member l9 which is secured to thetraverse rail carrying the funnel guides for pot spinning machines orthe thread guides for bobbin machines. Attached to the top of the yokel8 and reciprocating therewith is a guide member 2| which serves, withthe aid of the traverse member, to restrict the movement of the yoke toits path of reciprocation. The traverse member i9 and the guide member2| are slidably mounted in the bearing members 20 and 22 respectively.Al-

though the embodiment of the present invention shows the traversemechanism situated on top of the spinning machine, it can easily be seenthat the actuating mechanism could be placed on the machine below thespinning funnels or other guides or it may be reoriented so that Figure1 would represent a plan view thereof and the guides or bobbins could becarried at spaced intervals along member l9.

As shown more particularly in Figure 4, reference character 25 indicatesa cylindrical traverse housing in which the spring members 26 and 21 arepositioned. The piston-like member 28 fixedly secured to the traversemember I9 separates the spring members and provides a bearing surfacefor each. These spring members act to absorb the energy of reversal bysubstantially eliminating the transmission of the force due to theweight of the funnel frame 23 to the cam follower member l2.

As illustrated the stroke of the traverse member is at a maximum.However, the stroke of the traverse member may be varied by looseningthe locking nut 29 and turning the eccentric member in either directionuntil the desired index 32 mates with the centering mark 3| on the slideblock (6. With an adjustment of'this sort it is possible to utilizespinning buckets of different depths or bobbins of different lengths inconjunction with the present invention.

After the eccentric member has been locked in place it is necessary tomake a timing correction on the back of the housing. This isaccomplished by loosening the locking nuts 33, 34, 35 and 36 on the lugs31, 38, 39 and 40 respectively. The thereby loosened cam track orcorrection cam is rotated by turning the screw head 4| in eitherdirection. This action rotates a pinion gear 42 which meshes with thegear teeth 43 cut on the inner periphery of the cam track. The cam trackis then set in adjusted position by tightening nuts 33, 34, 35, and 36.A stationary pointer 45 indicates, on the scale 44, the relation of thecam track to the position of the eccentric member. The scale of theeccentric member and the correction cam are so calibrated that when theeccentric member is rotated-to a certain graduation, the correction camshould be rotated to the same graduation on its scale. This relativechange in position of the correction cam assures quick reversal atopposite ends of the stroke for any corresponding change in the lengthof stroke of the traverse member.

Improved permeability of the formed cake or other package is assured bythe ofisets 46 and 41 in the cam track [3. These offsets eliminate thedwell at the end of each stroke that is inherent in the use of acircular cam track and insure instead a quick reversal at each end ofthe funnels stroke. With the elimination of this dwell the density atthe top and bottom of the cake is decreased and a cake of more uniformdensity from end to end is produced.

Figures and 6 illustrate two modified cam track designs that may beemployed in the present invention. It is often desirous to utilizedifferent winding patterns in the processing of wound packages since thepermeability of the cake or bobbin is dependent on the winding pattern.It is possible to change this pattern by increasing the speed of thetraverse, which increases the helix angle, or by changing the loci ofthe funnel exit. The latter is accomplished by changing the shape of thecam track. As shown, Figure 5 represents a track that is generallyelliptical on the forward stroke and generally circular on the returnstroke. This construction will produce a wound package which has a largewinding helix on the forward stroke and a smaller winding helix on thereturn stroke. Figure 6 illustrates a cam track having three mainconvolutions. Although it has been shown with only three convolutions itis to be understood that any number may be employed. These convolutionscause the windings to move progressively forward and return, but causesthem to wind back on themselves at predetermined intervals with asmaller stroke than the maximum overall stroke of the traverse menber.

Although this invention has been described with reference toimprovements shown, it will readily be appreciated that numerous changesmay be made without departing from the spirit and scope of the inventionas defined in the appended claims.

I claim:

1. In a traver se mechanism, a traverse member, a rotatable crank armhaving gear teeth on a portion of its outer periphery, a Scotch yoke, ablock slidably mounted in said yoke, the slide block being connected tothe crank arm and the yoke being connected to the traverse member,eccentric means in the slide block for adjusting the stroke of thetraverse member, means for rotating the crank arm comprising a. drivingpinion, a gear driven by the pinion, gear means pivotally mounted on thegear and meshing with the gear teeth on the crank arm, a cam, means forconnecting the cam and the gear means for varying the rotation of thecrank arm at predetermined intervals during each cycle of revolution,and means for adjusting the angular relationship between the cam and theaxis of rotation of the crank arm.

2. In a traverse mechanism, a traverse member, a rotatable crank armhaving gear teeth on a portion of its outer periphery, a Scotch yoke, ablock slidably mounted in said yoke, the slide block being connected tothe crank arm and the yoke being connected to the traverse member,eccentric means in the slide block for adjusting the stroke of thetraverse member, means for rotating the crank arm comprising a drivingpinion, a gear driven by the pinion, a sector gear pinned to the gearand meshing with the gear teeth on the crank arm, a cam, means forconnecting the cam and the sector gear for varying the rotation of thecrank arm at predetermined intervals during each cycle of revolution,means for adjusting the angular relationship between the cam and theaxis of rotation of the crank arm.

3. In a traverse mechanism, a traverse member, a rotatable crank armhaving gear teeth on a portion of its outer periphery, a Scotch yoke, ablock slidably mounted in said yoke, the slide block being connected tothe crank arm and the yoke being connected to the traverse member,eccentric means in the slide block for adjusting the stroke of thetraverse member, means for rotating the crank arm comprising a drivingpinion, a gear having the same axis of rotation as the crank arm drivenby the pinion, a sector gear pinned to the gear and meshing with thegear teeth on the crank arm, a cam, means for connecting the cam and thesector gear for varying the rotation of the crank arm at predeterminedintervals during each cycle of revolution, means for adjusting theangular relationship between the cam and the axis of rotation of thecrank arm.

4. In a traverse mechanism, a traverse member,

a rotatable crank arm having gear teeth on a portion of its outerperiphery, a Scotch yoke, a block slidably mounted in said yoke, theslide block being connected to the crank arm and the yoke beingconnected to the traverse member, eccentric means in the slide block foradjusting the stroke of the traverse member, means for rotating thecrank arm comprising a driving pinion, a gear having the same axis ofrotation as the crank arm driven by the pinion, a geared sector pinnedto the gear and meshing with the crank arm, a cam, a cam follower, aneccentric arm connecting the cam follower and the sector at apredetermined angle therefrom for varying the rotation of the crank armat predetermined intervals during each cycle of revolution, means foradjusting the angular relationship between the cam and the axis ofrotation of the crank arm.

5. In a traverse mechanism, a traverse member, a rotatable crank armhaving gear teeth on a portion of its outer periphery, a Scotch yoke, ablock slidably mounted in said yoke, the slide block being connected tothe crank arm and the yoke being connected to the traverse member,eccentric means in the slide block for adjusting the stroke of thetraverse member, means for rotating the crank arm comprising a drivingpinion, a gear having the same axis of rotation as the crank arm drivenby the pinion, a geared sector pinned to the gear and meshing with thecrank arm, a cam, a cam follower, an eccentric arm connecting the camfollower and the sector at a predetermined angle therefrom fixedlysecured at the point where the sector is pinned on the gear for varyingthe rotation of the crank arm at predetermined intervals during eachcycle of revolution, means for adjusting the angular relationshipbetween the cam and the axis of rotation of the crank arm.

6. In a traverse mechanism, a traverse member, a rotatable crank armhaving gear teeth on a portion of its outer periphery. a Scotch yoke, ablock slidably mounted in said yoke, the slide block being connected tothe crank arm and the yoke being connected to the traverse member,eccentric means in the slide block for adjusting the stroke of thetraverse member, means for rotating the crank arm comprising a drivingpinion, a gear having the same "axis of rotation as the crank arm drivenby the pinion, a geared sector pinned to the gear and meshing with thecrank arm, a cam, a cam follower, an eccentric arm connecting the camfollower and the sector at a predetermined angle therefrom fixedlysecured at the point where the sector is pinned on the gear for varyingthe rotation of the crank arm at predetermined intervals during eachcycle of revolution, means for angularly adjusting the angularrelationship between the cam and the axis of rotation of the crank arm.

7-. In a traverse mechanism, a traverse member, a rotatable crank armhaving gear teeth on a portion of its outer periphery, a Scotch yoke, a

block slidably mounted in said yoke, the slide block being connected tothe crank arm and the yoke being connected to the traverse member,eccentric means in the slide block for adjusting the stroke of thetraverse member, means for rotating the crank arm comprising a drivingpinion, a gear having the same axis of rotation as the crank arm drivenby the pinion, a geared secton pinned to the gear and ,meshing with thecrank arm, a stationary cam, a cam follower, an eccentric arm connectingthe cam followerand the sector at a predetermined angle therefromfixedly secured at the point where the sector is pinned on the gear forvarying the rotation of the crank arm at predetermined intervals dur ingeach cycle of revolution, means for angularly adjusting the angularrelationship between the cam and the axis of rotation of the crank arm.

IVANHOE P. DENYSSEN.

REFERENCES CITED The following references are of record in the I file ofthis patent:

UNITED STATES PATENTS Sacchini Jan. 15, 1946 Certificate of CorrectionPatent No. 2,463,604. March 8, 1949.

IVANHOE P. DENYSSEN It is hereby certified that error appears in theprinted specification of the above numbered patent requiring correctionas follows:

Column 6, lines 22 and 23, claim 7, for secton read sector;

and that the said Letters Patent should be read with this correctiontherein that the same may conform to the record of the case in thePatent Oflice.

Signed and sealed this 11th day of October, A. D. 1949.

THOMAS F. MURPHY,

Assistant Oonuniaaioner of Patents.

